"""
当前版本1.0

1.0简单查询成绩等级

"""

exam_score = eval(input("考了几分啊？同学"))
if 90 <= exam_score <= 100:
    print('考的真棒，你是A呢')
elif 80 <= exam_score < 90:
    print('考的不错，你是B呢')
elif 70 <= exam_score < 80:
    print('考的一般，你是C')
elif 60 <= exam_score < 70:
    print("好好学，考了个D还在这笑嘻嘻！！！")
else:
    print("输入错误")
